The X-Sense CO03D-W Link+ is an advanced wireless carbon monoxide sensor that provides the highest level of protection against the dangerous and odourless gas carbon monoxide (CO). With its wireless connectivity feature, this sensor creates a safety network in the home and can be synchronised with other X-Sense Link+ alarms. So if one sensor detects a hazard, all other devices on the network will sound the alarm immediately. This advanced function gives you the highest level of protection and the peace of mind that everyone in the house will be immediately alerted to a threat, no matter where they are.